Oblicz. /-kreska ułamkowa *-znak mnożenia a) 16/9 - 4/9 : 5/9 - 9/5 = b) 8/3 + 5/3 * 9/10 : (1 5/10 - 1/4) : 1/2 = PILNE!!!!!

a) 16/9 - 4/9 : 5/9 - 9/5 = 16/9- 4/9 * 9/5-9/5= 16/9- 4/5-9/5=16/9- 13/9= 3/9= 1/3 b) 8/3 + 5/3 * 9/10 : (1 5/10 - 1/4) : 1/2 = 8/3+3/2:(1 1/2-1/4):1/2= 8/3+3/2:(6/4-1/4)*2= 8/3+ 3/2:5/4*2= 8/3+ 3/2*4/5*2= 8/3+ 12/5= 40/15+ 36/15= 76/15= 5 1/15